Skip to content
sellWeak cluster of 4

Gary K. Lee sold $23k of LYEL

Chief Scientific Officer at Lyell Immunopharma, Inc.. 1,457 shares at an average of $15.54, traded Aug 21, 2026, filed Aug 25, 2026.

Warning score
30
Value
$23k
1,457 shares
Holdings after
16,220
-8% from before
From 52-week low
+46%
low $10.65, close $15.53
From 52-week high
-60%
high $38.60, as of Aug 21, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $23k at market
    0
  • Share of holdings sold
    Sold 8.2% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +15

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

LYELOct 9, 2026 · close 8.71
Since filing Aug 25, 2026: -43.8%SPY +1.8% · excess -45.6%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001907345-26-000006, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 21, 2026SOpen-market sale
Common Stock
-1,457$15.54$23k16,220Aug 25, 2026

Related signals

Other insiders at Lyell Immunopharma, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
15Weak
LYELsell
Lyell Immunopharma, Inc.
David Shook
Chief Medical Officer
$6,350
500 shares
-2%
35Weak
LYELsell 4
Lyell Immunopharma, Inc.
Stephen J. Hill
Chief Operating Officer
$15k
989 shares
-6%
56Moderate
LYELsell 4
Lyell Immunopharma, Inc.
Lynn Seely
President and CEO
$149k
9,589 shares
-13%
30Weak
LYELsell 4
Lyell Immunopharma, Inc.
Veronica Sanchez Bulis
VP, Corporate Controller
$8,905
621 shares
-4%
35Weak
LYELsell 4
Lyell Immunopharma, Inc.
Stephen J. Hill
Chief Operating Officer
$1,276
89 shares
-0%
30Weak
LYELsell 4
Lyell Immunopharma, Inc.
Gary K. Lee
Chief Scientific Officer
$1,879
131 shares
-1%
40Moderate
LYELsell 4
Lyell Immunopharma, Inc.
Lynn Seely
President and CEO
$5,593
390 shares
-1%
0Weak
LYELsell10b5-1
Lyell Immunopharma, Inc.
Innovative Cellular Therapeutics Holdings Ltd
owner
$137
10 shares
-0%
0Weak
LYELsell10b5-1
Lyell Immunopharma, Inc.
Innovative Cellular Therapeutics Holdings Ltd
owner
$137
10 shares
-0%
30Weak
LYELsell 4
Lyell Immunopharma, Inc.
Veronica Sanchez Bulis
VP, Corporate Controller
$4,103
217 shares
-1%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Gary K. Lee sold $23k of LYEL | InsiderTell